Means for and method of forming slots in metallic members



April 27 1926. r

l R. E. KLAGES MEANS FOR AND METHOD 0F FoRuING' sLoTs IN METALLIG ulns Filed August 4, 1922 51? @Mil cmo p rovision of "holes in metallic members o f panying drawings,

Figure 2 is a vertical Patented Apr.l .27,

UNITED STATES Application filed August` 4,

To all whom it may concern:

Be it known that I, RnYNoLn E. KLAGEs, a

citizen of the United States, and a resident o to means for, and or elongated openand method of, forming slots or elongated ings in tubular walls of drag links for mobiles.

t One of the objects of the invention is the or in any tubuy an opening in a.

i orelongated.

and elongated openings in tubular members.

A still further object of the invention is means for enlarging or extending holes or openings in metallic members K Other and further objects and advantages of the invention will appear as the description proceeds. `r f The method herein described of forming non-circular openings in metallic members, such as plates, bars and more especially the method of elongating openings in the side walls of tubes, consists ffirst in forming cir-I cular hodes and then enlarging or extending'4 those holeswith suitable mechanism.`

ince 'mechanism for forming circular all kinds is old and well known in the art,

parts in sect l section on line 2 2 of-Flgure 1, parts broken'aw'ay; i

gure 1 is a front elevation, tlon';

i922. serial No.

metallic members,v i

. guides 1l. A h

new and improved means'whereany proper means.

Y l 1,582,052 PATENT 4ori-fiers.-

or coLUMnUs, omo.

METALLIC MEMBERS.

Figure 3 is a section on. line 33with the work removed; `igure 4 is a the punch members or tools; and f `1gures 5, 6 and 7 are views of one end'of adrag link showing different steps in the development of the hole or opening formed t erein. l

On the drawing, the numeral 10 be, may be acame of the n is provided wlth the o ich constitutes supports for the devlce and 1n the upper portion of which is Journalled a crank shaft 12 l to be. reclprocated wlthin' said known manner.Y adaptedto beA operated by Preferably, it is` power the power being applied to the he usual manner. A clutch 18 operated by the foot pedal 19 is provided for controlling vthe rotation of the crankshaft 12, as is usual in suchjconstruclons. t The frame 11 is provided with means for supporting the dies 20 and 2l, such as the Ale ,ge-25.` 1 The dies 2Q and 21 may be considered as forming a die block. The die block 1s securedto the frame 11 in any convenient device is operated wh ledge 25.

detail view showing one of designates grooves or recesses 23 and 28?, respectively,-

which are shaped to conform to th e external tool holder or plunger 27 i loo y members to the holder 28 and are adapted to extend upwardly therefrom and slidably engage through openings 31 and 31Ll in said dies 0 and 21, respectively. These openings are preferably made to conform to ithe'shape o the tools for the purpose of guiding the same during their operation. Any suitable means may be provided for securing the punch the holder 28. As shown, the punch members terminate in anged lower ends 32, 32a which are adapted to engage in corresponding counter-bores in the lower ends ofthe openings 33, 33 in the holder. The punch members are inserted from below and are adapted to be rictionally held in the openings, the ianges on the punch members seating in said counter-bores and holding the tools irmly in position during the punching operation. vAny other suitable means may be provided for holding vthe punch members in the holder.

In certain'classes ot articles, as for instance in drag links, it is necessary to elongate a comparatively small opening to a material extent. In order to accomplish this it is necessary to repeat the punching or piercing process one or more times, or provide a plurality ot punch members which are adapted to successively operate on the article, because a punch member that is small enough to enter the original opening or opening of the required size cannot be made strong enough to enlargegpr ,elongate that opening to the desired extene'at. one operation. A

For the purpose of illustration, I have shown means for enlarging or elongating openings in a drag link in two operations. I havealso shown a separate die and tool for each operation. It is understood, however, that the invention is not so limited.

The punch member or tool 29 is made small enough in cross section to enter the original opening 35 formed in any suitable manner in the enlarged'end'member 36 of the drag link 37, see igures 1 and 5. The member 29 is provided with a reduced or throat portion 38 which is shaped to fit the peripheral edge of one side of the opening or hole 35 to thereby determine the direction of the elongation. If the hole or opening 35 be circularas shown on the drawing, the convex throat portion is curved to the same radius. An overhanging head portion 39, which may have its extremity curved as at 39 to conform to the concavity of the tube to be operated upon, is provided with a shearing, punching or cutting edge 40 which is adapted to cooperate with a corresponding shearing or cutting edge formed on the die 20 to shear or cut out a portion of the member 36 to form the extension 42 to the opening 35. (See Figures 4 and 6.)

The tool or punch member 30 for the die -21 is similar to that just described. It is,

cutting ed is first formed shape, proportion and consists however, longer and stronger as indicated in Figure 2. Since this tool operates after the other, the tool may be made vot" a thickness corresponding to the width of the extension 42 and a width corresponding to the combined length of the two openings. This tool or punch member is also provided with a corresponding shearing, punching or cutting edge 43 which is adapted to cooperate with the shearing or cutting the die 21 for edge `44 formed` on further enlarging or extending the opening in cated at 45 in F' the member 36 as indiigure 7.

It will be noted that the cutting edges ot both tools or punching members are in rear of the holder 28. In other words, the support 28 precedes the cutting or shearing edge of the tool during the cutting or shearing operation. It will also be noted that the ge of the tool being straight and that of the die being curved, theiry cooperation is more nearly like a shearing than a punching ope-ration. I

When it is desired to form elongated openings in metallic members. as for instance Jforming the usual key-hole shaped openings in drag links, a circular hole or opening 35 in the usual or anv manner, after which the link is placed in the die with the tool or punc into the tube through tool at the upper limit of its movement. The tube or link is then pushed causing the periph ry of the hole or opening 35 to come into contact with the throat 38 after which the machine is operated to cause the tool to descend to shear or cut outl a portion of the tubular wall, thus enlarging l or tool member is operated to remove a portion of the wall of the tube outwardly to form the slot.

It is thought from the foregoing taken in connection with the accompanying drawings that the construction and operation of my device will be apparent to those skilled in the art, andthat various changes in size,

details of construction may e made without departing from the spirit and scope of the appended claims.

I claim:

1. A -method ofV forming opening in a in first forming Van opening through the wall of said hollow member and then nibbling portions outwardly away from the wall about said opening.

an elongated hollow metallic member, which.

2. A method of forming an opening in a l tubular member which consists iu first forming au opening 1n the wall of said member and then inserting a tool and nibbling the wall away by withdrawing said tool.

3. In a device of the class described, a die member provided with an openingtherethrough and over which material may be passed for working, a tool or punch member movably mounted in said opening` and provided with a hooked end, and means forv reciprocating the hooked end' of said teol through said opening. I

4. In a device of the class described, a die member having a curved recess for the reception of a tubular member and provided with an opening extending therethrough at right angles to said recess, a punch member 'movable in said opening, said punch mempunch or cutting tool comprising a reduced portion and provided With a cutting edge offset from' said convex surface, said head having its extremity curved at right angles to the curvature of said convex surface substantially as shown and described.

6. In' a devicev ofthe class described, a frame, a die block supported on said frame and provided with parallel curved recesses on its upper surface for the reception of metallic tubular members, and having an opening extending from'each recess downwardly through said block, a holder mounted for reciprocation beneath said block, punch members or tools secured to said support and extending upwardly through said openings, said punch members being provided with reduced portions, having convex surfaces for engaging the peripheral edge Vot holes formed in said tubular members,

and having head portions adapted to enter said holes and provided with cutting edges overhanging said convex surfaces, the distance between the cutting edge and convex surface of one tool beinggreater than the other, and means for reciprocating said support.

In testimony whereof I affix my signature.-

REYN OLD E. KLAGES. 

